To balance an equation you should:

Change BOTH subscripts and coefficients.

During photosynthesis, water and carbon dioxide react to form oxygen and glucose. Which are the reactants, which are the products?

Reactant Water and Carbon Dioxide Product Oxygen and Glucose

Reactants Oxygen and Glucose Product Water and Carbon Dioxide

When paper is burned, the mass of the remaining ash is less than the mass of the original paper. Which statement best explains this result?

Some of the products of the reaction were given off as a gas.

The ash has less volume than the paper.

Some of the matter is destroyed during the reaction.

The mass of the ash cannot be accurately determined.

When coal is burned, sulfur is released into the air, where it reacts with oxygen to produce sulfur dioxide and sulfur trioxide. Which of these is true of this process? Choose the correct answer.

The products have different chemical properties than those of the reactants.

The identity of each reactant remains the same.

Sulfur dioxide and sulfur trioxide are the reactants in this change.

The products contain more sulfur atoms and fewer oxygen atoms than the reactants.

Which of the following best describes the role of reactants in a chemical reaction?

They are the substances that are consumed during the reaction.

They are the substances that are formed as a result of the reaction.

They are the catalysts that speed up the reaction.

They are the by-products of the reaction.

In the chemical equation @@ ext{C}_6 ext{H}_{12} ext{O}_6 + 6 ext{O}_2 ightarrow 6 ext{CO}_2 + 6 ext{H}_2 ext{O}@@, which of the following are the products?

$$\text{CO}_2$$ and $$\text{H}_2\text{O}$$

$$\text{C}_6\text{H}_{12}\text{O}_6$$ and $$\text{O}_2$$

$$\text{C}_6\text{H}_{12}\text{O}_6$$ and $$\text{CO}_2$$

$$\text{O}_2$$ and $$\text{H}_2\text{O}$$

During a chemical reaction, the mass of the reactants is 50 grams. After the reaction, the mass of the products is measured to be 50 grams. What does this demonstrate?

The law of conservation of mass

The law of definite proportions

The law of multiple proportions

The law of conservation of energy

Which of the following is an example of a real-world application of reactants and products?

Photosynthesis in plants, where carbon dioxide and water are converted into glucose and oxygen.

The melting of ice into water, where ice is the reactant and water is the product.

The boiling of water, where water is the reactant and steam is the product.

The freezing of water, where water is the reactant and ice is the product.

Reactants and Products Lesson

Authored by Lisa Thompson

Science

7th Grade

NGSS covered

Used 2+ times

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25 questions

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MULTIPLE CHOICE QUESTION

1 min • 5 pts

Substances present at the start of a chemical reaction

subscripts

coefficients

reactants

products

MULTIPLE CHOICE QUESTION

1 min • 2 pts

What is underlined in the chemical equation below?
Na + Cl ---> NaCl

Products

Reactants

MULTIPLE CHOICE QUESTION

1 min • 2 pts

In the chemical equation below, the product is....
Na + Cl ---> NaCl

NaCL

NaCl

MULTIPLE SELECT QUESTION

1 min • 4 pts

Select all the reactants

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

starting material in a chemical reaction

subscript

coeffient

reactants

Tags

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In this image, the information to the RIGHT of the arrow (in BLACK) is called the_______.

Product

Reactant

Chemical Subscript

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

1 min • 5 pts

In this image, what are the information to the right of the arrow (in black) is called the_______?

Product

Reactant

Chemical Subscript

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

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Reactants and Products Lesson

Substances present at the start of a chemical reaction

What is underlined in the chemical equation below?
Na + Cl ---> NaCl

In the chemical equation below, the product is....
Na + Cl ---> NaCl

Select all the reactants

starting material in a chemical reaction

In this image, the information to the RIGHT of the arrow (in BLACK) is called the_______.

In this image, what are the information to the right of the arrow (in black) is called the_______?

How many grams of coal were present at the start of the chemical change?

In this image, the symbol to the right of the arrow (in black) are called _______.

The reaction arrow (-->) in chemical equation always points TOWARDS the...

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

Reactants and Products Lesson

Substances present at the start of a chemical reaction

What is underlined in the chemical equation below?Na + Cl ---> NaCl

In the chemical equation below, the product is....Na + Cl ---> NaCl

Select all the reactants

starting material in a chemical reaction

In this image, the information to the RIGHT of the arrow (in BLACK) is called the_______.

In this image, what are the information to the right of the arrow (in black) is called the_______?

How many grams of coal were present at the start of the chemical change?

In this image, the symbol to the right of the arrow (in black) are called _______.

The reaction arrow (-->) in chemical equation always points TOWARDS the...

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

What is underlined in the chemical equation below?
Na + Cl ---> NaCl

In the chemical equation below, the product is....
Na + Cl ---> NaCl